Powers:Martha is a telepath, and her powers in this area are shown as being quite advanced, to the degree that she is capable of overpowering Emma Frosts's subconscious defenses (it should however be mentioned that Emma's telepathy was inoperative at the time, as she was in her "diamond" form and thus had solely the scope of her willpower to rely on) and manipulating entire teams of individuals.

Without a body, Martha is limited in all other areas. She, as a brain, travels in a fluid-filled jar with technology (invented by fellow Xavier Institute student Kid Omega) that lets it float, and is anchored via a metal chain.

Bio:Martha was a mutant runaway who was captured by the human supremacist group, the U-Men. Their founder John Sublime had her brain removed her body, keeping the disembodied brain alive in a capsule. Sublime controlled her through drugs and syringes and used her to subdue his opponents—X-Men Cyclops and Emma Frost. The two X-Men eventually broke free of her control, after which Martha took her revenge on Sublime by causing him to fall to his death.

She later became a student in the Xavier Institute's Special Class. There she befriended Ernst, a mysterious, super-strong mutant appearing like an old woman, who often repeated Martha's telepathic communications.

In the Planet X storyline Esme of the Stepford Cuckoos, who was secretly working with Xorn, manipulated Martha through the same drugs and syringes that Sublime had used. She forced Martha to influence the minds of the Special Class students, including Beak, Basilisk, and Angel Salvadore, and make them go along with Xorn's plans. Martha thus joined Xorn, apparently revealed as Magneto, as a member of his Brotherhood. However, after being witness of the actions of "Magneto", Martha and Ernst began to question and then turned against him.

Notes:Note: One instance suggested that Martha used the alias of No-Girl, but No-Girl was either a "real" student or a prank on the part of the "Special Class" at Xavier's.